7B15: Difference between revisions
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==Internals== | ==Internals== | ||
A ramp generator is started when the trigger signal arrives. The delayed sweep is started when a | |||
comparator detects that the ramp has reached a control voltage, set by the front panel knobs. | |||
The control voltage is therefore proportional to the amount of delay and is measured using a | |||
[[155-0185-00]] 4-digit DVM circuit, then displayed on the [[7000 series readout system|oscilloscope readout]]. | |||
The display, scaled in seconds, provides the operator with a precise readout of the delay. | |||
Other custom Tek ICs used: [[155-0150-00]] trigger detector, [[155-0160-00]] trigger amplifier. | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
7b15-front.jpg | 7b15-front.jpg | 7B15 front panel | ||
7b15-left.jpg | 7b15-left.jpg | left side | ||
7b15-right.jpg | right side | 7b15-right.jpg | right side | ||
Tek-7b15-vs-7b85-left.jpg | Family resemblance: 7B15 (top) vs. 7B85 (bottom). Left side. | |||
Tek-7b15-vs-7b85-right.jpg | Family resemblance: 7B15 (top) vs. 7B85 (bottom). Right side. | |||
Tek 7b15 front.jpg | Tek 7b15 front.jpg | ||
Tek 7b15.JPG | Tek 7b15.JPG | ||
Revision as of 06:18, 31 January 2016
The Tektronix 7B15 is a 1 GHz delaying time base for 7000-series scopes, in particular, the 1 GHz 7104 (typically used with 7A29 vertical amplifiers and a 7B10 delayed time base).
The 7B15 provides digital readout of delay and delta times. In effect, the 7B15/7B10 pair are speed-improved versions of the 7B85/7B80.
Key Specifications
| Sweep | 200 ms/Div to 2 ns/Div in 1-2-5 sequence, ×10 magnifier down to 200 ps/Div, variable to ×2.5 |
|---|---|
| Triggering | to 1 GHz |
| Jitter | less than 30 ps at 1 GHz |
| Features |
|
Internals
A ramp generator is started when the trigger signal arrives. The delayed sweep is started when a comparator detects that the ramp has reached a control voltage, set by the front panel knobs. The control voltage is therefore proportional to the amount of delay and is measured using a 155-0185-00 4-digit DVM circuit, then displayed on the oscilloscope readout. The display, scaled in seconds, provides the operator with a precise readout of the delay.
Other custom Tek ICs used: 155-0150-00 trigger detector, 155-0160-00 trigger amplifier.
Pictures
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7B15 front panel
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left side
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right side
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Family resemblance: 7B15 (top) vs. 7B85 (bottom). Left side.
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Family resemblance: 7B15 (top) vs. 7B85 (bottom). Right side.
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